To find the area of the triangle, given the length of the three sides, we may use the Heron's Formula.
`A = sqrt(s(s-a)(s-b)(s-c))`
where A - Area of triangle
a, b, c - length of the sides of the triangle
s - semi-perimeter, `s = (a+b+c)/2`
So, let a =AB=6.8m, b = BC=9.5m and c=AC=10.2m.
Then, solve for s.
`s = (a+b+c)/2 = (6.8 + 9.5+10.2)/2 = 26.5/2= 13.25`
And, substitute values of , b, c and s to the formula of area of triangle.
Hence, the area of triangle is `31.26m^2` .